故障模糊预测系统开发环境的思想及其实现

针对故障诊断的现状和发展，本文探讨了故障模糊预测系统的开发环境，并研究了系统的知识表达方式和推理控制策略。     

一种改进支持向量域数据描述方法及其应用

针对支持向量域数据描述中的核参数选择及其决策边界规整问题,提出一种新的改进算法.该算法根据支持向量域数据描述本身的特点,利用非高斯性来测量核空间样本接近球形区域分布的程度,并根据此测量结果来优化核参数.当核参数选定之后,核空间样本可能存在分布不均匀的现象,对此,该算法应用核主元分析来进行规整,即通过尺度变换来调整各主轴的长度,以获得一个更合理的球形分界面.最后通过标准数据集和TEP故障诊断仿真以验证该算法,仿真实验结果表明了该算法的有效性.     

PID feedback for mixed H2/H∞ tracking control of robotic manipulators

The design objective of a mixed H2/H∞ control is to find the H2 optimal control law under aprescribed disturbance attenuation level. This paper addresses a optimal PID control law on the basis of the newsolution to mixed H2/H∞optimal control problem that provide much more flexible design compared to the existing works. Then a closed-form PID controller to mixed H2/H∞ robotic tracking problem is simply constructed and hence the design procedure is presented.Finally, numerical simulations illustrate the effectiveness of the optimal PID feedback design proposed in this paper via a two-link robotic manipulator.